I had read a number of times, back when the FBI and S&W were going back-and-forth over these guns, that the trouble was in some lockwork change that the FBI had specified that differed somehow from the standard lockwork parts. No one ever defined what the differences were.

I figured then that, because I read it several times from several sources, that it was probably true. I now wonder if it was just one person's speculation, read and repeated by others.

It does seem odd to me that the FBI was the only group that had trouble with the M-1076. I am unaware of anyone else complaining of problems.